초록 ▼

A multiple filter unit in the form of a complete interchangeable unit for insertion into a motor vehicle interior ventilation duct, or into the mouth of air conditioners or into suction-producing apparatus for closed environments, including a rigid casing provided with retention and sealing means, a

A multiple filter unit in the form of a complete interchangeable unit for insertion into a motor vehicle interior ventilation duct, or into the mouth of air conditioners or into suction-producing apparatus for closed environments, including a rigid casing provided with retention and sealing means, a series of filter elements and/or chemical products and/or electrostatic filtering devices disposed in a predetermined order for filtering solid particulate matter, mists and air pollutant gases, and means for checking the degree of efficiency.

대표청구항 ▼

A multiple filter unit for motor vehicle ventilation and air conditioning systems, for introduction and stable insertion as a complete interchangeable unit into an air intake duct in motor vehicles, said filter unit comprising: a substantially rigid casing having a cross-sectional shape correspondin

A multiple filter unit for motor vehicle ventilation and air conditioning systems, for introduction and stable insertion as a complete interchangeable unit into an air intake duct in motor vehicles, said filter unit comprising: a substantially rigid casing having a cross-sectional shape corresponding to that of the intake duct into which it is inserted, and of slightly smaller cross-sectional dimensions; an outer, rearwardly tapering covering of elastic, flexible material on said casing to enable said casing to be forced into and retained in said duct; a series of filter elements constituted by mechanical and chemical filters disposed in a predetermined order for substantially complete filtration and purification of the air; means for gripping and extracting the filter unit, said gripping means connected to the casing; and means for checking the state of efficiency of the filter unit. A multiple filter unit for closed environments, said filter unit comprising: a rigid outer casing of a suitable cross-section for fitting into seats provided on a fixed structure, said casing including a flange with passage holes for screws for its fixing to the fixed structure, and including seal gaskets; a filter unit assembly divided into two separate parts each contained in a rigid inner casing; a low-speed electric fan disposed between the two filter units for creating the suction necessary for operation of the filter unit assembly, said two filter units forming an entire filter unit assembly.